Hectopascal is a pressure unit used to express mechanical, atmospheric or process pressure values.
The hectopascal equals the millibar. Meteorology adopted it in the late 20th century because it keeps weather-map values unchanged: standard sea-level pressure is 1013.25 hPa.
Measurement system: SI, metric and practical engineering pressure usage. SI equivalent: 1 hPa = 100 Pa.
Hectopascal facts
- Unit name
- Hectopascal
- Symbol
- hPa
- Category
- Pressure
- Measurement system
- SI, metric and practical engineering pressure usage
- SI equivalent
- 1 hPa = 100 Pa
- Common uses
- Process systems, service gauges, scientific work and field measurements
Definition of the hectopascal
Hectopascal is a pressure unit used to express mechanical, atmospheric or process pressure values.
Measurement system and SI relationship
SI, metric and practical engineering pressure usage
SI equivalent: 1 hPa = 100 Pa
History of the hectopascal
The hectopascal equals the millibar. Meteorology adopted it in the late 20th century because it keeps weather-map values unchanged: standard sea-level pressure is 1013.25 hPa.
Where is the hectopascal used?
Process systems, service gauges, scientific work and field measurements